Thanks, in both remote buildings I'll have indoor APs (MR52 I believe) connected to a L3 switch as well as the MR74 on the roof of the buildings. The center building will have (2) MR74s, one point to the gateway, one pointed to the remote building. I'm not too worried about bandwidth, there will only be 1 or 2 iPads in use at each location used to enter electrical meter readings in a industrial control room a couple times a day.
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